The rationale behind the weighted formula is to favour documents that contain
both qualitative (the part weighted by wPATH) and quantitative (the
part weighted by wSBO) information concerned with a given pathway.
The score assigned to qualitative information about the pathway is composed of
the score given to the mentions of the pathway in general (the part weighted by
wGO) and the maximal score given to a reaction from the pathway (the
part weighted by wRN). A reaction is a complex concept and thus its
score consists of three parts: these correspond to an enzyme catalysing it (see
wEC), the compounds acting as substrates/products of the reaction
(see wCPD), and the genes encoding the enzyme (see wSCE).